The next factor we are going to take a look at is comfort. There are a few things I noticed the moment I took a hold of the GM2400; the plastic on top feels very cheap, and the side buttons were right where I wanted to rest my thumb. The mouse, because of the cheap feeling plastic, was not enjoyable to use and felt like it would break if I handled it with too much force. Also, the buttons being placed on the side where my thumb wanted to rest made me need to almost hover my thumb instead of squeeze the mouse. This just felt annoying and made use of the GM2400 not as enjoyable as its brother, the GM3200, or the old Logitech, both of which seemed to use higher quality plastics. In this next graph, higher is better.